Energy storage battery management system, method and application

Abstract

The present application discloses an energy storage battery management system, comprising: a host computer; a master control module, comprising a first master control unit and a second master control unit with mutual redundant backup, which are connected to the first and second communication interfaces of the host computer through their respective third and fourth communication interfaces, respectively, to form first and second communication links; a plurality of slave control modules, which are connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit through their respective seventh communication interfaces, respectively, to access the first communication link; and connected to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit through the eighth communication interface, to access the second communication link; a plurality of battery modules, the status information of the corresponding battery modules is collected by the slave control modules and fed back to the master control module; a charging contactor and a discharging contactor, the actions of which are respectively controlled by the master control module. This can solve the problem that multiple control units of the existing battery management system are all connected to the same bus, resulting in the entire line not being able to work normally when a node has a problem.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to an energy storage battery management system, an energy storage battery management method, an electronic device, and a computer-readable storage medium. Background Art

[0002] Energy storage battery management systems are typically used as a backup power source in addition to the grid. If the grid fails and cannot continue to power the load, the system switches to battery power to support normal load operation. Because the voltage of a single battery is low and insufficient to meet the power requirements of most loads, energy storage battery management systems typically consist of multiple cells connected in series and parallel. Due to differences between individual cells and the possibility of low battery charge or overcharge during the charge and discharge process, the battery pack's normal power supply and stable and reliable operation can be affected. Therefore, during battery operation, the voltage of each individual cell must be tested and monitored, and balancing measures must be implemented to maintain consistent characteristics across the cells. Furthermore, battery packs draw high operating currents and are typically installed in confined and narrow spaces. Consequently, high temperatures can endanger the battery life, necessitating battery pack status monitoring. A battery management system (BMS) monitors and manages battery status, while also interacting and communicating with the user.

[0003] Existing battery management systems use a master-slave topology, also known as a distributed structure, and utilize the CAN bus for unit management and communication. Since a battery pack has multiple units connected to the same CAN bus, if a node fails, the entire circuit will not function properly. Summary of the Invention

[0004] In response to at least one defect or improvement need in the prior art, the present invention provides an energy storage battery management system, method and application thereof, aiming to solve the problem that multiple control units in the existing battery management system are connected to the same bus, resulting in the entire circuit not being able to operate normally when a problem occurs in a certain node.

[0005] To achieve the above objectives, according to a first aspect of the present invention, there is provided an energy storage battery management system, comprising: a host computer including a first communication interface and a second communication interface; a master control module including a first master control unit and a second master control unit for mutual redundant backup, each connected to the first communication interface of the host computer via its respective third communication interface to form a first communication link, and connected to the second communication interface of the host computer via its respective fourth communication interface to form a second communication link; a plurality of slave control modules, each connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit via its respective seventh communication interface to access the first communication link; and connected to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit via its respective eighth communication interface to access the second communication link; a plurality of battery modules, each connected to the corresponding slave control module, so that the slave control module collects status information of the battery module and feeds it back to the master control module; and a charging contactor and a discharging contactor, each controlled by the master control module, wherein the charging contactor is connected between the battery module and the power grid, and the discharging contactor is connected between the battery module and the load.

[0006] In one embodiment of the present invention, each of the slave control modules includes a first slave control unit and a second slave control unit that serve as redundant backups for each other, and each includes the corresponding seventh communication interface and the eighth communication interface.

[0007] In one embodiment of the present invention, the first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the fifth communication interface, the sixth communication interface, the seventh communication interface and the eighth communication interface all adopt CAN communication interfaces.

[0008] In one embodiment of the present invention, the charging contactor includes a first charging contact unit and a second charging contact unit that serve as redundant backups for each other and are connected to the first main control unit and the second main control unit, respectively; the discharging contactor includes a first discharging contact unit and a second discharging contact unit that serve as redundant backups for each other and are connected to the first main control unit and the second main control unit, respectively.

[0009] In one embodiment of the present invention, the charging contactor and the discharging contactor are connected to the power grid and the load via a converter.

[0010] According to a second aspect of the present invention, there is also provided an energy storage battery management method applicable to the energy storage battery management system described in any one of the above embodiments, comprising: a master control module obtaining control instructions from a host computer, and controlling, according to the control instructions, the grid to charge the battery module when the charging contactor is closed, and controlling the load to discharge the battery module when the discharging contactor is closed; wherein the first control unit and the second control unit of the master control module are connected to the first communication interface and the second communication interface of the host computer via their respective third communication interfaces and fourth communication interfaces, thereby forming a dual communication link redundancy backup; a slave control module obtaining status information of the corresponding battery module and feeding it back to the master control module, and the master control module forwarding the status information to the host computer, thereby forming a control closed loop; wherein the slave control module is connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit via their respective seventh communication interfaces, thereby accessing the first communication link; and wherein the slave control module is connected to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit via their respective eighth communication interfaces, thereby accessing the second communication link, thereby forming a cross-redundancy backup between the master control module and the slave control module.

[0011] In one embodiment of the present invention, the slave control module obtains the status information of the corresponding battery module and feeds it back to the master control module, including: the first slave control unit and the second slave control unit that serve as redundant backups of each of the slave control modules both obtain the status information of the corresponding battery module, and the first slave control unit and the second slave control unit feed it back to the master control unit.

[0012] In one embodiment of the present invention, controlling the grid to charge the battery module when the charging contactor is closed and controlling the load to discharge the battery module when the discharging contactor is closed according to the control instruction includes: the first main control unit and the second main control unit are respectively connected to the first charging contact unit and the second charging contact unit of the charging contactor which are redundant backups of each other, and the first discharging contact unit and the second discharging contact unit of the discharging contactor which are redundant backups of each other, to send control instructions to control the operation of the charging contactor and the discharging contactor.

[0013] According to the third aspect of the present invention, an electronic device is also provided, which includes at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit performs the steps of the method described in any one of the above embodiments.

[0014] According to a fourth aspect of the present invention, a computer-readable storage medium is also provided, which stores a computer program executable by an access authentication device. When the computer program runs on the access authentication device, the access authentication device executes the steps of the method described in any one of the above embodiments.

[0015] In general, the above technical solutions conceived by the present invention can achieve at least the following beneficial effects compared with the prior art:

[0016] 1) By implementing dual-redundant hot backup in the hardware electrical design of the master control module, each of the two master control units includes four communication interfaces, and the third and fourth communication interfaces thereof are connected to the first and second communication interfaces of the host computer, respectively, forming two communication networks that back up each other. In addition, the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit are connected to the seventh communication interface of the slave control unit, and the fifth communication interface of the second master control unit and the sixth communication interface of the first master control unit are connected to the eighth communication interface of the slave control unit. This implements a cross-redundant backup communication architecture between the master control unit and the slave control unit, greatly enhancing the anti-interference capability of the two communication networks. Even if the fifth or sixth communication interface of the master control module fails, the two communication networks to which it is connected can still operate stably.

[0017] 2) The slave control unit, charging contactor and discharging contactor all use 1+1 redundant hot backup to ensure the reliable operation of the module itself. The connection between each module uses two parallel lines to ensure the reliability of the connection, which can be applied to occasions with requirements for power supply system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the structure of an energy storage battery management system provided in an embodiment of the present application;

[0020] Figure 2 A flowchart of a method for managing an energy storage battery provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] The terms "first," "second," "third," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a particular order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0023] like Figure 1 As shown, the first embodiment of the present invention proposes a battery management system (BMS), which includes, for example: a host computer, a master control module, several slave control modules, several battery modules corresponding to the slave control modules, a charging contactor, a discharging contactor, and a power supply grid controlled by the charging contactor and a load controlled by the discharging contactor.

[0024] The host computer mentioned herein is, for example, a personal computer, a handheld device, a portable device, a tablet device, a multi-processor system, a microprocessor-based system, an editable consumer electronic device, a network PC, a minicomputer, a mainframe computer, or a distributed computing environment including any of the above systems or devices, etc. The communication between the host computer and the main control module adopts, for example, a 1+1 hot backup mode. Specifically, the host computer includes a first communication interface and a second communication interface. The third communication interface of the main control module is connected to the first communication interface of the host computer to form a first communication link. The fourth communication interface is connected to the second communication interface of the host computer to form a second communication link.

[0025] Furthermore, the main control module includes, for example, a first main control unit and a second main control unit that are mutually redundant backups. The main control unit mentioned is a battery management unit (BMU), which is used to communicate and interact with the host computer, obtain control instructions from the host computer to control the grid to charge the battery module when the charging contactor is closed, and control the load to discharge the battery module when the discharge contactor is closed.

[0026] In addition to the third and fourth communication interfaces mentioned above, the two master control units also have fifth and sixth communication interfaces. Several slave control modules connect to the first master control unit's fifth communication interface and the second master control unit's sixth communication interface via their respective seventh communication interfaces, accessing the first communication link. They also connect to the second master control unit's sixth communication interface and the first master control unit's fifth communication interface via their respective eighth communication interfaces, accessing the second communication link. This creates a cross-redundant backup communication architecture between the master and slave control units, significantly enhancing the anti-interference capabilities of the two-way communication network. Even if the fifth or sixth communication interface of a master control module fails, the two communication networks it connects to can still operate stably.

[0027] Furthermore, each slave control module, for example, includes a first slave control unit and a second slave control unit that serve as redundant backups for each other. The first slave control unit and the second slave control unit both include corresponding seventh and eighth communication interfaces, and are connected to the first master control unit and the second master control unit in the above-mentioned cross-redundant backup manner, thereby further improving the reliability of the system. Among them, the slave control unit mentioned is a cell monitor unit (CMU), which is used to measure status information such as voltage, current, and temperature of the corresponding battery module and feed it back to the master control module BMU. The BMU can evaluate the data transmitted by the CMU. If the data is abnormal, it will protect the battery, issue a request to reduce the current, or cut off the charge and discharge path to prevent the battery from exceeding the permitted usage conditions, and also manage the battery power and temperature. In addition, according to the previously designed control strategy, it can also determine the parameters and status that require warnings, and send the warning information to the host computer, and finally convey it to the operator.

[0028] Furthermore, the first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the fifth communication interface, the sixth communication interface, the seventh communication interface and the eighth communication interface all adopt CAN communication interfaces, for example, to form two CAN bus communication networks between the host computer, the master control module and the slave control module, thereby improving the reliability of the system.

[0029] The charging contactor is connected between the battery module and the power grid, while the discharging contactor is connected between the battery module and the load. Controlled by the main control module, they enable and disable the charging and discharging circuits. Specifically, for example, the main control unit receives battery pack status information and determines whether the battery pack is fully charged, closing the discharging contactor to discharge the load. If the battery pack charge level falls below a certain level, the main control unit closes the charging contactor to charge the battery pack. Converters are connected between the charging contactor and the power grid, and between the discharging contactor and the load, to achieve AC-to-DC or DC-to-AC conversion.

[0030] Furthermore, the charging contactor, for example, includes a first charging contact unit and a second charging contact unit that serve as redundant backups for each other, and are respectively connected to the first main control unit and the second main control unit; the discharging contactor includes a first discharging contact unit and a second discharging contact unit that serve as redundant backups for each other, and are respectively connected to the first main control unit and the second main control unit. In this way, the slave control unit, the charging contactor, and the discharging contactor all adopt 1+1 redundant hot backup to ensure the reliable operation of the module itself, and the connection between each module adopts two parallel lines to ensure the reliability of the connection, which can be suitable for occasions where there are requirements for the reliability of the power supply system.

[0031] In summary, the energy storage battery management system proposed in the first embodiment of the present invention implements dual redundant hot backup in the hardware electrical design of the master control module. Each of the two master control units includes four communication interfaces, and the third and fourth communication interfaces are connected to the first and second communication interfaces of the host computer, respectively, to form two mutually backed-up communication networks. In addition, the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit are connected to the seventh communication interface of the slave control unit, and the fifth communication interface of the second master control unit and the sixth communication interface of the first master control unit are connected to the eighth communication interface of the slave control unit. This implements a cross-redundant backup communication architecture between the master control unit and the slave control unit. The anti-interference capability of the two communication networks is greatly enhanced. Even if the fifth or sixth communication interface of the master control module fails, the two communication networks to which it is connected can still operate stably. The slave control unit, charging contactor, and discharging contactor all adopt 1+1 redundant hot backup to ensure the reliable operation of the module itself. The connection between each module adopts two parallel lines to ensure the reliability of the connection. The battery management system is suitable for applications where the reliability of the power supply system is required.

[0032] A second embodiment of the present invention further provides a method for managing an energy storage battery, for example, comprising step S1: obtaining a control instruction from a host computer by a master control module, and controlling the grid to charge the battery module when the charging contactor is closed, and controlling the load to discharge the battery module when the discharging contactor is closed according to the control instruction; wherein the first control unit and the second control unit of the master control module are connected to the first communication interface and the second communication interface of the host computer through their respective third communication interface and fourth communication interface, forming a dual communication link redundant backup; step S2: obtaining status information of the corresponding battery module by a slave control module and feeding it back to the master control module, and the master control module forwarding the status information to the host computer, forming a control closed loop; wherein the slave control module is connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit through their respective seventh communication interfaces, thereby accessing the first communication link; and connecting to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit through their respective eighth communication interfaces, thereby accessing the second communication link, thereby forming a cross-redundant backup between the master control module and the slave control module.

[0033] It is worth mentioning that the energy storage battery management method disclosed in the second embodiment of the present invention is applicable to the energy storage battery management system proposed in the aforementioned first embodiment. The specific structure and function of the energy storage battery management system can refer to the contents described in the first embodiment. For the sake of brevity, it will not be described in detail here. The continuous missile launch control method provided in this embodiment has the same beneficial effects as the energy storage battery management system provided in the first embodiment.

[0034] In addition, the third embodiment of the present invention also provides an electronic device, for example, including: at least one processing unit, and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit executes the method as described in the first embodiment, and the beneficial effects of the electronic device provided by this embodiment are the same as the beneficial effects of the energy storage battery management method provided by the first embodiment.

[0035] In addition, the fourth embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the above-mentioned energy storage battery management method are implemented, and the beneficial effects of the computer-readable storage medium provided by this embodiment are the same as the beneficial effects of the energy storage battery management method provided by the third embodiment.

[0036] Among them, computer-readable storage media may include, but are not limited to, any type of disk, including floppy disks, optical disks, DVDs, CD-ROMs, microdrives and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and / or data.

[0037] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0038] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0039] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interface, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0040] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0041] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0042] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0043] Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0044] The above is only an exemplary embodiment of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure herein, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not recorded in the present disclosure. The description and examples are to be regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

[0045] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An energy storage battery management system, characterized in that: include: The host computer includes a first communication interface and a second communication interface; A main control module, comprising a first main control unit and a second main control unit with mutual redundant backup, each of which is connected to the first communication interface of the host computer through its respective third communication interface to form a first communication link, and is connected to the second communication interface of the host computer through its respective fourth communication interface to form a second communication link; Several slave control modules are connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit through their respective seventh communication interfaces to access the first communication link; and are connected to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit through their respective eighth communication interfaces to access the second communication link; Several battery modules are respectively connected to the corresponding slave control modules, so that the slave control modules collect status information of the battery modules and feed it back to the master control module; A charging contactor and a discharging contactor, each controlled by the main control module, wherein the charging contactor is connected between the battery module and the power grid, and the discharging contactor is connected between the battery module and the load; Each of the slave control modules includes a first slave control unit and a second slave control unit which are redundant backups of each other, and both include the corresponding seventh communication interface and the eighth communication interface; The charging contactor includes a first charging contact unit and a second charging contact unit that serve as redundant backups for each other and are connected to the first main control unit and the second main control unit, respectively; the discharging contactor includes a first discharging contact unit and a second discharging contact unit that serve as redundant backups for each other and are connected to the first main control unit and the second main control unit, respectively.

2. The energy storage battery management system according to claim 1, characterized in that: The first communication interface, the second communication interface, the third communication interface, the fourth communication interface, the fifth communication interface, the sixth communication interface, the seventh communication interface and the eighth communication interface all adopt CAN communication interface.

3. The energy storage battery management system according to claim 1, characterized in that: The charging contactor and the discharging contactor connect the power grid and the load through a converter.

4. A method for managing an energy storage battery, characterized in that: The energy storage battery management system according to any one of claims 1 to 3 comprises: The main control module obtains the control instructions of the host computer, and controls the grid to charge the battery module when the charging contactor is closed, and controls the load to discharge the battery module when the discharging contactor is closed according to the control instructions; wherein the first control unit and the second control unit of the main control module are connected to the first communication interface and the second communication interface of the host computer through their respective third communication interfaces and fourth communication interfaces, forming a dual communication link redundancy backup; The slave control module obtains the status information of the corresponding battery module and feeds it back to the master control module, and the master control module forwards the status information to the host computer to form a control closed loop; wherein, the slave control module is connected to the fifth communication interface of the first master control unit and the sixth communication interface of the second master control unit through their respective seventh communication interfaces, and accesses the first communication link; and is connected to the sixth communication interface of the second master control unit and the fifth communication interface of the first master control unit through their respective eighth communication interfaces, and accesses the second communication link, forming a cross-redundant backup between the master control module and the slave control module.

5. The energy storage battery management method according to claim 4, characterized in that: The slave control module obtains the status information of the corresponding battery module and feeds it back to the master control module, including: The first slave control unit and the second slave control unit of each slave control module, which serve as redundant backup for each other, both obtain status information of the corresponding battery module, and the first slave control unit and the second slave control unit feed back the information to the master control unit.

6. The energy storage battery management method according to claim 4, characterized in that: The method of controlling the grid to charge the battery module when the charging contactor is closed and controlling the load to discharge the battery module when the discharging contactor is closed according to the control instruction includes: The first main control unit and the second main control unit are respectively connected to the first charging contact unit and the second charging contact unit of the charging contactor which serve as redundant backups for each other, and the first discharging contact unit and the second discharging contact unit of the discharging contactor which serve as redundant backups for each other, so as to send control instructions to control the operation of the charging contactor and the discharging contactor.

7. An electronic device, characterized in that: The method comprises at least one processing unit and at least one storage unit, wherein the storage unit stores a computer program, and when the computer program is executed by the processing unit, the processing unit performs the steps of the method according to any one of claims 4 to 6.

8. A computer-readable storage medium, characterized in that It stores a computer program executable by the access authentication device. When the computer program runs on the access authentication device, the access authentication device executes the steps of the method according to any one of claims 4 to 6.

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